Bests & Worsts Reviews from Amazon

Pros. Kit looked good. Manifolds built well. Crossover pipe built well. Mostly all the hardware. All gaskets supplied. Looks good in photos. Oil feed adaptor and hose work well and are easy to install. Cons. Manifolds required grinding back around spark plug location due to not being able to get a plug socket to install spark plugs. Turbo exhaust vband was 3" and not 3.5" as the vband was supplied. Needed to purchase 3"vband clamp. Turbo manifold T4 flange, drilled to 3/8. Turbo flange drilled to accommodate 10mm bolt. With a 3/8 bolt the turbo was sloppy in the bolt holes. Had to drill manifold flange to accommodate 10mm bolt for snug fit. Crossover pipe. Does not fit if your vehicle is lifted. I had to cut and exstend the pipe to the flanges 1.5" to clear front drive shaft. No boost reference barb off outlet or drilled hole off of the turbo for wastegate( as pictured) Need to drill turbo outlet and tap a thread to fit. Photos 2 shows dump pipe and aircon canister clearance, on a 2013 the dump pipe hits the outlet hose. Have clamped this back as far as possible and wrapped to protect. Time will tell if I need to manufacturer a complete new hose to clear. Summary. Not a simple install on a 2013 4wd silverado. Havent tested on the road.